POTS

Pots
http://knol.google.com/k/postural-tachycardia-syndrome#

http://circ.ahajournals.org/cgi/content/full/117/21/2814

http://en.wikipedia.org/wiki/Postural_orthostatic_tachycardia_syndrome

http://www.pediatricnetwork.org/medical/OI/johnshopkins.htm

Sphenoid sinus disease
http://emedicine.medscape.com/article/862435-overview

http://emedicine.medscape.com/article/994274-overview

http://knol.google.com/k/nasal-polyps#

http://www.severe-headache-expert.com/sphenoid-sinusitis.html

http://www.ncbi.nlm.nih.gov/pmc/articles/PMC1501099/

http://www.severe-headache-expert.com/acute-headache.html

http://74.125.93.132/search?q=cache:m7YrldgDsl8J:www.utmb.edu/otoref/Grnds/Sphenoid-200010/Sphenoid-0010.doc+opacification+sphenoid+sinus&cd=6&hl=en&ct=clnk&gl=us&client=firefox-a